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Transition And Polyatomic Ions 2008
 

Transition And Polyatomic Ions 2008

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    Transition And Polyatomic Ions 2008 Transition And Polyatomic Ions 2008 Presentation Transcript

    • Transition Metals & Polyatomic Ions
    • Goal 1 Name ionic compounds that contain transition metals
      • Transition Metals
        • Total charge on compound = 0
        • Electron loss can vary
        • Roman numerals
          • Indicate charge
      • Step 1: Determine total charge on nonmetal
      MnO O = 2- Fe 2 S 3 S 3 = 6-
      • Step 2: Determine needed charge on transition metal to create an equal opposite charge (multiply by subscript)
      MnO Mn = 2+ O = 2- Fe 2 S 3 Fe = 3+ S 3 = 6-
      • Step 3: Use charge on transition metal to determine your roman numeral
      MnO Mn = 2+ O = 2- manganese(II) oxide Fe 2 S 3 Fe = 3+ S 3 = 6- iron(III) sulfide
      • Try it backwards!
      • Chemical formula from a name
      Tin(II) oxide
      • Step 1: Determine charge on transition metal
      Tin(II) oxide Sn = 2+
      • Step 2: Determine charge on nonmetal ion
      • (use periodic table)
      Tin(II) oxide Sn = 2+ O = 2-
      • Step 3: Determine how many of each needed to equal 0 charge (CC&R)
      Tin(II) oxide Sn = 2+ O = 2- SnO
      • Try it…
      • Iron(III) fluoride
      • Were you correct?
      • Iron(III) fluoride
      • FeFl 3
      • Try again (this time backwards)
      • TiN
      • Were you correct?
      • TiN
      • titanium(III) nitride
      • And again…
      • PbO 2
      • Were you correct?
      • PbO 2
      • lead(IV) oxide
    • Goal 2 Name ionic compounds using polyatomic ions
      • Polyatomic ions
        • Covalently bonded elements with a charge
        • May be indicated by parentheses
      (OH - ) (OH - ) 2
        • Use the same as a single ion
        • Information found on back of periodic table
      Hydroxide ion
      • Step 1: recognize use of polyatomic ion
        • Name ends in “- ate ” or “- ite ”
        • Name that is not an element… cyanide
        • Parentheses used in chemical formula
        • Or… check anyways
      Sodium sulf ate Na 2 (SO 4 )
      • Step 2: use back of your periodic table to determine charge on the polyatomic ion
      Sodium sulfate 2-
      • Step 3: determine how many metal ions needed to make a 0 charge (criss-cross)
      Sodium 1+ 2 sulfate 2- Na 2 (SO 4 )
      • Try it….
      • Calcium chlorate
      • Try it….
      • Calcium chlor ate
      • Try it….
      • Calcium chlorate 1-
      • Try it….
      • Calcium 2+ chlorate 1- 2
      • Ca(ClO 3 ) 2
      CC&R stays OUTSIDE of polyatomic parentheses